Field of a Circular Loop: a Long Straight Wire on the Z-Axis

question 57

Multiple Choice

Field of a circular loop: A long straight wire on the z-axis carries a current of 6.0 A in the positive direction. A circular loop in the xy-plane, of radius 10 cm, carries a 1.0-A current, as shown in the figure. Point P, at the center of the loop, is 25 cm from the z-axis. An electron is projected from P with a velocity of 1.0 × 10⁶ m/s in the negative x-direction. What is the y component of the force on the electron? (e = 1.60 × 10^-19 C, μ₀ = 4π × 10^-7 T ∙ m/A)

• A) -1.0 × 10^-18 N
• B) +1.0 × 10^-18 N
• C) -2.0 × 10^-18 N
• D) +2.0 × 10^-18 N
• E) zero

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Definitions:

Existential Import

The notion that a statement implies the existence of the subject matter it discusses.

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Modern View generally refers to the contemporary perspective or way of thinking about a particular topic or issue.

Existential Import

Refers to the assumption in logic that a statement implies the existence of the subject it mentions.

Modern View

A contemporary perspective or understanding of a subject, reflecting recent developments or ideas.